This probably wasn't directed towards me, but I thought I would answer yor question anyways. Yes it bolts right on to the side of your engine using the same mounting holes as your stock muffler. No modification should be required because this macs pipe is made just for the os .46FX[link]http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXZ652&P=ML[/link]